| Acronym | Definition |
|---|
| SSST | Southeastern Symposium on System Theory |
| SSST | Supersonic Sea Skimming Target |
| SSST | Sarajevo School of Science and Technology (Bosnia and Herzegovina) |
| SSST | Short Scottish Secure Tenancy (Scottish law) |
| SSST | Super Secret Sideboard Tech (gaming, CCG Magic:The Gathering) |
| SSST | Stealth Satellite System Terminator |
| SSST | Space Station Systems Trainer |
| SSST | Standard Seedbox Screening Test |
| SSST | Simulation System Support Team |
| SSST | Society of the Most Holy Trinity (The Trinitarians) (religious order) |
| SSST | Smart Sensor System Testbed (networking) |